A combination of light microscopical and electron microscopical techniques were used in
this investigation of the venous drainage system of the subdermal microvessels of rabbit
skin. The vessels were sectioned longitudinally to facilitate analysis of different segments of
the venules. By using as criteria the luminal diameter, the perivascular elements, and the
relationship of the vessel to the local vascular pattern, the venous part of the microcirculatory
bed is divided into the following segments.(a) Venous capillary: capillaries with a diameter of …